dom/base/StyleSheetList.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/StyleSheetList.h"
   8
   9 #include "mozilla/dom/StyleSheetListBinding.h"
  10 #include "nsINode.h"
  11
  12 namespace mozilla::dom {
  13
  14 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(StyleSheetList)
  15
  16 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(StyleSheetList)
  17   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  18   NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
  19   NS_INTERFACE_MAP_ENTRY(nsISupports)
  20 NS_INTERFACE_MAP_END
  21
  22 NS_IMPL_CYCLE_COLLECTING_ADDREF(StyleSheetList)
  23 NS_IMPL_CYCLE_COLLECTING_RELEASE(StyleSheetList)
  24
  25 /* virtual */
  26 JSObject* StyleSheetList::WrapObject(JSContext* aCx,
  27                                      JS::Handle<JSObject*> aGivenProto) {
  28   return StyleSheetList_Binding::Wrap(aCx, this, aGivenProto);
  29 }
  30
  31 void StyleSheetList::NodeWillBeDestroyed(nsINode* aNode) {
  32   mDocumentOrShadowRoot = nullptr;
  33 }
  34
  35 StyleSheetList::StyleSheetList(DocumentOrShadowRoot& aScope)
  36     : mDocumentOrShadowRoot(&aScope) {
  37   mDocumentOrShadowRoot->AsNode().AddMutationObserver(this);
  38 }
  39
  40 StyleSheetList::~StyleSheetList() {
  41   if (mDocumentOrShadowRoot) {
  42     mDocumentOrShadowRoot->AsNode().RemoveMutationObserver(this);
  43   }
  44 }
  45
  46 }  // namespace mozilla::dom